Broadly tunable deep blue laser based on a star-shaped oligofluorene truxene

Yue Wang, Georgios Tsiminis, Ying Yang, Arvydas Ruseckas, Alexander L. Kanibolotsky, Igor F. Perepichka, Peter J. Skabara, Graham A. Turnbull, Ifor David William Samuel

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

We report amplified spontaneous emission (ASE) and optically pumped deep-blue-emitting distributed feedback (DFB) lasers based on a star-shaped oligofluorene truxene molecule. A low ASE threshold of 2.1 kW/cm(2) at 439 nm was achieved. The material exhibits a high net gain of 38 cm(-1) and also low optical loss coefficient of 3.5 cm(-1). Second-order DFB lasers show tuning of the emission wavelength from 422 to 473 nm, and a minimum threshold density of 515 W/cm(2). This is the broadest tuning range (51 nm) reported for organic deep-blue/blue lasing materials. (C) 2010 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)1397-1400
Number of pages4
JournalSynthetic Metals
Volume160
Issue number13-14
Early online date20 May 2010
DOIs
Publication statusPublished - Jul 2010

Keywords

  • Fluorene
  • Oligomers
  • Amplified spontaneous emission
  • Organic semiconductor
  • Distributed feedback
  • 2-DIMENSIONAL DISTRIBUTED-FEEDBACK
  • CONJUGATED POLYMERS
  • ORGANIC SEMICONDUCTOR
  • GAIN
  • LUMINESCENCE
  • EFFICIENCIES

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